[PULL,16/23] target/riscv: Add a riscv_cpu_is_32bit() helper function

Commit Message

Alistair Francis Dec. 18, 2020, 6:01 a.m. UTC

Signed-off-by: Alistair Francis <[e-mail]>
Reviewed-by: Bin Meng <[e-mail]>
Tested-by: Bin Meng <[e-mail]>
Reviewed-by: Palmer Dabbelt <[e-mail]>
Acked-by: Palmer Dabbelt <[e-mail]>
Message-id: ebd37b23[e-mail]
---
 target/riscv/cpu.h | 2 ++
 target/riscv/cpu.c | 9 +++++++++
 2 files changed, 11 insertions(+)

Patch

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 9c064f3094..6339e84819 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -384,6 +384,8 @@  FIELD(TB_FLAGS, VILL, 8, 1)
 /* Is a Hypervisor instruction load/store allowed? */
 FIELD(TB_FLAGS, HLSX, 9, 1)
 
+bool riscv_cpu_is_32bit(CPURISCVState *env);
+
 /*
  * A simplification for VLMAX
  * = (1 << LMUL) * VLEN / (8 * (1 << SEW))
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 6a0264fc6b..32a6916b8a 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -108,6 +108,15 @@  const char *riscv_cpu_get_trap_name(target_ulong cause, bool async)
     }
 }
 
+bool riscv_cpu_is_32bit(CPURISCVState *env)
+{
+    if (env->misa & RV64) {
+        return false;
+    }
+
+    return true;
+}
+
 static void set_misa(CPURISCVState *env, target_ulong misa)
 {
     env->misa_mask = env->misa = misa;